Add GPL modules

MediaBrowser.Controller/Chapters/IChapterManager.cs

@@ -0,0 +1,23 @@
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using MediaBrowser.Model.Entities;
+
+namespace MediaBrowser.Controller.Chapters
+{
+    /// <summary>
+    /// Interface IChapterManager
+    /// </summary>
+    public interface IChapterManager
+    {
+        /// <summary>
+        /// Gets the chapters.
+        /// </summary>
+        /// <param name="itemId">The item identifier.</param>
+        /// <returns>List{ChapterInfo}.</returns>
+
+        /// <summary>
+        /// Saves the chapters.
+        /// </summary>
+        void SaveChapters(string itemId, List<ChapterInfo> chapters);
+    }
+}